Honda CIVIC 2023 Owner's Manual page 690

uuRefuelinguHow to Refuel
Holder
688
7. Place the fuel fill cap in the holder.
8. Insert the fuel filler nozzle fully.
Cap
u When the tank is full, the filler nozzle will
click off automatically. This leaves space
in the fuel tank in case the fuel expands
with a change in the temperature.
u If you do not fill up the tank to full,
always add a minimum of 1.3 US gal (5 L)
of fuel.
9. After filling, replace the fuel fill cap,
tightening it until you hear it click at least
once.
u Shut the fuel fill door by hand.
1How to Refuel
If you repeatedly fill the tank with less than the
specified minimum amount of fuel, the malfunction
indicator lamp may come on. If this happens, have
your vehicle checked by a dealer.